becasue I don't like one card turning everything into a threat.
Well, only noncreature artifacts. Vintage tends to have a fair amount of those, but there have been many times in standard where they were pretty rare. And these times will return in the near future.
Should we add some clause such that if they blow up the land, the artifacts de-animate?
Maybe, but then again, it's only until end of turn as it is.
Does this wording set a specific p/t at the time of resolution or will the p/t flucuate with the number of structures?
That is a very good question. I dunno, really. I guess the ability checks for the # of structures when it resolves, but what happens when you play a new one after that under this current wording, I really have no idea.
